On another list, a dog list, a friend mentioned that Whole Foods Market had deionized water for 39 cents a gallon. Before I retired, I ran a wafer fab operation and we used a lot of DI water and it was very clean. I decided to buy a gallon and try making CS with it. I have a COM 100 meter and this water measured better than any water I have tried. My SilverGen loved it and it made very good CS.

Cheers,
Gene